Cabot Corporation

David M Reed

Sridhar Venigalla

Jeffrey A Kerchner

Ricky W Kitchell

Dorran L Schultz

Heather L Enman

Stephen J Krause

Methods to at least partially reduce a niobium oxide are described wherein the process includes mixing the niobium oxide and niobium powder to form a powder mixture that is then heat treated to form heat treated particles which then undergo reacting in an atmosphere which permits the transfer of oxygen atoms from the niobium oxide to the niobium powder, and at a temperature and for a time sufficient to form an oxygen reduced niobium oxide. Oxygen reduced niobium oxides having high porosity are also described as well as capacitors containing anodes made from the oxygen reduced niobium oxides.

Methods of making a niobium metal oxide and oxygen reduced niobium oxides

Valve metal suboxides having a primary suboxide phase and optionally a secondary suboxide phase, a valve metal phase, and/or at least one tertiary suboxide phase can be present in varying amounts. Also disclosed is anodes and capacitors containing the valve metal suboxides of the present invention. Also, a method to prepare a valve metal suboxide is further described which includes granulating one or more of the starting materials individually or together and/or granulating the final product.

Phase formation of oxygen reduced valve metal oxides and granulation methods

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Douglassville, PA, United States of America

David M Reed